Can anyone please recommend a good free graph plotter that I can download. I am looking for a program that can produce neat looking graphs with all the axes, grids and that can plot many different functions. I tried to use Geogebra but I don't really like because the results of the plot look less like those found in most textbooks (Geogebra has different font, etc). I also used MathLab and Mathematica but I don't think those are beautiful enough to be displayed in textbooks or articles.
I tried to download "Graph" https://www.padowan.dk/download/, but the exe file is always corrupted so I cannot install.
And if possible I want the graph to be converted and saved as picture formats like JPEG, PNG, and also PDF etc.
Thanks for the recommendation.